Voters in two towns were polled about what party they would support in the upcoming election.  In town A, 120 of the 200 people polled indicated that they were likely to vote for Labor. In town B, 60 of the 150 people polled indicated Labor.

The standard error in the difference (A-B) between the proportions was calculated to be 0.053.

Are the towns different? What is the 99% confidence interval for the difference between the proportions the populations of these 2 towns (A-B) in their voting intentions?